Radiator



Jan. 3, 21933. B, MURRAY 1,893,034

RADIATOR Filed DEC. 13. 1929 IWI.

7 2 a n a Patented dan. 1933 TATES PATENT QFFICE JOSEPH B. MURRAY, 0F BROOKLYN, NE'W YG'tK, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 A L'VIERICAN RADIATOR da STANDARD SANITARY CORPORATION, A CORPRATION QF DELAWARE RADIATOR Application led December 13, 1929.

bodiments of the invention.

Fig. 1 is a front elevationy of a radiator of the Murray type;

Figs. 2, 8 and 4 are longitudinal sections of alternative designs for the open ends of the tube;

Fig. 5 is a section on the line 5 5 of Fig. 1;

Fig. 6 is a similar section showing a modification;

Figs. 7 and 8 are respectively a partial elevation and a sectional View of a modified arrangement of the loop of the tube;

F Fig. 9 is a plan of the right-hand end of ig 10 is a horizontal section of a modification.

A tube 1 for conveying steam or hot Water (or cold brine, or the like, Where the apparatus is to be used for cooling the air instead of heating it) is arranged in successive lengths connected by a loop 2 With projecting ends 3 for attachment of the main pipes as described, for example, in certain previous applications of Thomas E. Murray. Ser. No. 709,080 filed April 26, 1924 (Patent No. 1,7 44,07 8, January 21, 1980), and others.

A pair of corrugated sheets are applied to opposite sides of the tube providing transverse fins 4 (Fig. 9) connected alternately at their outer ends by longitudinal plates 5 and at their inner ends by longitudinal plates 6. The inner portions of the corrugations are recessed to embrace the tube and are clamped together around the tube by means of straps 7. The opposite straps are Welded together through the plates 6 and thus hold the corrugated sheets in close heat conducting contact With the tube, the Welds being indicated at 8. The extended area of the corrugated sheets provides vertical passages through which the air passes and is heated. A strong Serial No. 413,734.

draft is induced and causes a forcible circulation of the heated air throughout the room. rThis is a very efficient type of convection radiator. lt may be made in a variety of styles and designs in detail, in all of which the present invention is of value.

ln radiators of this type it is preferred to use a copper tube for its high conductivity and for its flexibility. For the same reasons, and also to make it lighter and more economical, there are advantages in using as thin a tube as possible and my invention is directed particularly to this end.

The corrugated sheets or other style of fins are applied to the tube at short intervals of the length of the latter, thus reinforcing it throughout most of its length. The finned portions of the tube, therefore, may be made of a gage so thin that it would not be feasible except for the reinforcing effect of the tins. This reinforcement is particularly effective with the strap connections described. The straps are generally of steel or other comparatively sti metal.

Vhere this reinforcement is lacking, I propose to provide special reinforcements. l,/ihere a loop, such as 2 extends beyond the finned portion of the tube, it may be reinforced, for example, in the Ways shown in Figs. 1 and 5 or in the alternative Ways shown in Figs. 6, 7 and 8.

According to Figs. 1 and 5, the reinforcement is also made to provide an extended heating area. Plates 9 are provided With recessed portions 10 embracing the loop of the tube and With extensions forming outside fins 11 of the same height as the corrugated sheets. These plates 9 are Welded or other- Wise united to each other firmly at points 13 and 14 close to opposite sides of the tube so as to ensure a good reinforcement and also a good heat conducting contact.

According to Figs. 7 and 8 similar plates 9 are fastened by means of straps 15 similar to those of Figs. 1 and 5 which are Welded through the plates 9 at opposite sides of the tubing.

Or as shown in Fig. 6, the loop 2 of thin tubing may be reinforced by a second tube 16 forced on to it before the formation of the loop, theouter tube being also of copper or other metal Which can be bent as required.

Where an end of the tube projects beyond Vthe finned portion', it may be reinforced in the Ways shovvn in Figs. 2, 3 and 4. In Fig.

2 it is swaged to form a portion 17 of extra thickness, Which is preferably flared for the making of a good connection to the steam pipe. f

'-According to Fig. 3 the end of the tube 3 is enlarged in diameter as at 18 and a reinforcing thimble 19 is inserted. Or, as inf Fig. 4, the end may be reinforced by an outer sleeve 2O forced on the end of the tube.-

Radiators made according to this invention show advantages of low cost and light Weight secured by utilizing the reinforcing effect of the radiatingvstructure throughout A, the greaterpart of the length of the tubing.

lThe shapes of the endsV of the tubes, as shown in Figs. 2, 3 and l, may be varied to suit the needs of the type of connectionl adopted. The tubular connection betvveen the lengths of piping may be also varied 2li? from thesimple curved shape ShOWIl at the right of Fig.j1, and may be reinforced in other Ways than those above described. The loop or other connection may, in fact, be

" stiifened by embracing it between corrugated plates' similar to those shovvn in the middle of the figure,"and such corrugated plates may be thus separate from or continuous with those along the body of the raamor.

Fig. 10 is inserted ytoshovv the application of the improvement to a radiator using another style of fins to secure the extended `area in Contact With the air. The tube 3 in this case issimilar to ythat of Fig. 2. Mountedy on'this tube kare sheet metal fins 21 which may be of various shapes in elevation and which are fastened to the tube by means of flanges 22 surrounding openings' through, which the tube is forced. Clamping rings, 45

solder or other fastening means may be used tol ensure a good connection. rFliese flanges embracey and strengthen the tube throughout the greater portion of its length. The end c of the tube is thickened as at 17. The reinforced ends of the tubes are long enough to extend baclrinto the radiator and to be enclosed by one or tWo of the fins. This is true for Fig. 1 aswell as for Fig. 10. The strains Y. on the end of the tube extend along its length to a considerable distance so that suchrreinforcement is advisable not only beyond the lins but Within the fins toy a slight extent.

What I claim is: 1. A radiator comprising a tube for the heating medium and ns in heat conducting relation thereto forming passages for the heated air, said tube being of cuprous metal` too soft and flexible to holditsV required shape in the radiator Without reinforcement and said fins serving to reinforce the portions of the tube to Which they are applied sufficiently to holdV it in the required shape, thetube having a portion extendingbeyond the fins and reinforced separately.

2. A radiator including in combination a tube for the heating medium, fins in engage- Inentvvith the tube throughout the principal portion of its length', said tube being of metal too thin and flexible to hold its required shape z in the radiator Without reinforcement; and said fins serving to reinforce the tube sufliciently to hold it in the required shapeand providing an extended area for heating the air, van end of theradiator comprising a portion of the tube extending beyond said principal portion, and a separate reinforcement for substantially the full length of such extend-ed portion.

`3. A radiator including in combination a tube for the heating medium in substantially parallel straight lengths connected by an inte'gral loop,said tube .being of metal too thin and flexible to hold its required shape in the radiator Without reinforcement, fins in en, gagem-ent With said straight lengths serving to reinforce the tube sufficiently to hold it in the required shape and providing an extend.

ed area forheating the air, and a separate reinforcement for substantially thev full length of such loop. f p

`l. Ar radiator including in combination a tube for the heating medium in substantially parallel straight lengths connected by an integral loop, said tube being of metal too thin and flexible to hold its required shape in the radiator Without reinforcement, fins in engagement with said straight lengths serving to reinforce the tube sufficiently to hold it in the required shape 'and providing an ex- A ifo bent portion ofthe tube'beyond the fins bestantially its full length.

In Witness whereof, I have hereunto signed.

my name. Y n

Y Josnrn B. MURRAY.

.ing yseparately reinforced throughout sub-A 

